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Shi M, London SJ, Chiu GY, Hancock DB, Zaykin D, Weinberg CR.Shi M, et al. Among authors: weinberg cr.Am J Epidemiol. 2011 Mar 1;173(5):553-9. doi: 10.1093/aje/kwq363. Epub 2011 Feb 4.Am J Epidemiol. 2011.PMID: 21296892Free PMC article.
Little RE, Weinberg CR.Little RE, et al. Among authors: weinberg cr.Am J Epidemiol. 1993 Jun 1;137(11):1177-89. doi: 10.1093/oxfordjournals.aje.a116620.Am J Epidemiol. 1993.PMID: 8322759